This mold clamp holds molds up to 1-7/16" thick. The Rio mold clamp applies even pressure to your rubber molds for consistent, accurate wax weights. Having the mold properly aligned and clamped helps prevent wax flashing. A quick load-and-release mechanism makes this lightweight, anodized aluminum clamp a must for any production shop. The heavy-gauge spring steel latch ensures even tension and years of service. Mold clamps are easy to load and unload.